Device to prevent rotation of bobbins



Nov. 17, 1925- 1,561,686

H. L. BLANCHARD DEVICE TO PREVENT ROTAIION OF BOBBINS Filed April 2 1924 A rxr 4 lllw w. F o 4o Z0 mi 3.1.9 lu-1% 1o lwvr/vro/a w, H1.. BLANC/#Wap mmm u @win-"mmf W @iii/lys ltl Patented Nov. 17, 1925.

UNITED STATES PATENToFFicE.

HAROLD L. BLANCHARD, OF NORTHBRIDGE, MASSACHUSETTSASSIGNOR TO CRUMP- TON & KNOWLES LOOM WORKS, OF WTORCESTER. MASSACEIUSETTS, A CORPORATION OF MASSACHUSETTS,

DEVICE TO IREVENT ROTATION OF BOBBINS.

Application filed April 2, 1924.

To @ZZ whom t fin/ay concern -Be it known that I, HAROLD L. BLANCHARD, a citizen of the United States, residing at Northbridge, in the county of Worcester and State of Massachusetts, have invented a new and useful Device to Prevent Rotation of Bobbins, of which the following is a specifi-` cation.

Thisrinvention relates to weft replenishingmechanism for `looms and more particularly to `means for preventing the rotation oflbobbins on their own axes as they await transfer.

. In the usual form of multi-color weft replenishing mechanism the bobbins are arrangedfloosely in vertical parallel compartmentsand are fed one by one to transfer position. It has been found that where the yarn is fine the bobbins are required to remainin the replenishing mechanism a suf -iicient length of time so that they roll on their axes and cause entanglement of the weft ends which extend to the thread holder.

It is the principal object of my invention to avoid this undesirable rotation of the bohbinsby exerting lateral pressure on t-hem by means of a pivoted wall which forms part ofthe compartment and is under control of the replenishing mechanism so as to release the bobbins to permit them to fall at the time of indication of weft exhaustion.

Another object of my invention is to provide adjacent bobbin compartments with pivoted walls held in bobbin restraining position by a plurality of spaced `yielding devices which permit either wall to move under control of the replenishing mechanism independently of the other wall.

llith these and other objects in view which will appear as the description proceeds, my invention resides inthe combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein I have shown one form of my invention, l

Fig. 1 is a side elevationof a portion of the replenishing mechanism having my invention applied thereto,

Fig. 2 is a vertical section taken on line Q--Q of Fig. 1,

Fig. 3 is an enlarged detail section of the upper` part of the structure shown in Fig. 2,

Fig. `4 is a horizontal ysection taken on, line aff/Of Fig Serial No. 703.605.

Fig. 5 is a view similar to Fig. 4 but having one of the walls moved out of bobbin restraining position.

Referring to the drawings it will be seen that I have. provided a replenishing mechanism having a frame on which is mounted and guided for vertical motion the slides 11 and 12. These slides are provided with upper lugs 13 and 14, respectively, and lower lugs 15 and 16, respectively, and have the lower portions thereof so formed as to actuate the bobbin controlling cradles (not shown).` A longitudinally and angularly movable rod 17 is jecting from the frame 10 and has secured thereto a finger 19 -to cooperate with the lugs'13, 14, 15 and 16. Thefinger 19 has adownward motion every second pick of the loom and has an upward motion at indication of substantial weft exhaustion to raise one or the other of the slides 11 or 12, according to the shuttle which is active. The frame 10 has extending therefrom flanges 20 and 21 which form the outer boundaries of the two bobbin compartments shown.

The matter thus far describedis part of the usual four color weft replenishing mechanism and for a further description of the same andits operation reference may be had to Patent No. 1,030,748.

My invention relates to the walls of the bobbin gnideways orcompartments and contemplatesthe useof a fixed and a movable wall for each compartment, the movable wall being pivoted` and normallyT moved against thebobbins` to restrain the latter against undue movement and moved `from bobbin restraining position by the weft replenishing mechanism at the time the bobbins are called upon to descend in the guideway.

Referring more particularly to Figs. 2 to 4 it will be seen that I have provided the frame 10 with a lower lug 30 and an upper bearing stand 31 which is provided with slots 32 to receive bolts 33, the slots permitting a. slight verticaladjustment of the bearing block 31. Rods 34 and 35 are provided, one for each bobbin compartment and have'their upper ends `threaded to be received by the threaded bores 36 and 37 of thel member `31. The lower ends of the rods extend loosely through and are held in po* sition by the lug guided in bearings 18` pro` Associated with the rods 34 and 35 are walls 38 and 39, respectively, each ot which is provided with upper and lower bearings 40 and 41, respectively, through which the rods extend. The bearings 41 rest on the lug 30 and thus support the walls, each of which movespivotally about its correspondino rod as a center.

Ixtending trom the walls 38 and 39 are ears 42 and 43, respectively, having 'formed thereon cams 44 and 45, respectively, positioned tor the reception ot pins 46 and 4ST which are carried with the slides 11 and 12, respectively. By referring to Fig. 4 it will be seen that the movable walls have 'formed on the adjacent -faces thereof bosses 4S between which extend compression springs 49, 5G and 51 which are disposed at different points along the walls so that the latter are; acted upon at a plurality ot points to move against the bobbins. To provide for variations in the diameters ot the bobbins I have provided each movable wall with a covering ot resilient material such as rubber or leather, indicated at 52.

In the normal operation of the replenishing mechanism the slides 11 and 12 are down as indicated in Fig. 3 and the pins 46 and 47 are located at the lower ends of cams 44 and 45 respectively, thus permitting the springs 49, 50 and 51 to push the movable walls against the bobbins. At indication ot weft exhaustion the slide corresponding to the indicating shuttle will be raised by iinger 19, slide 11 being indicated by dotted lines as in raised position in Fig. 2, As this slideisraised, pin 46 engages cam 44 to move wallBS away from bobbin restraining position as shown in FiO. 5, and the bobbins will theretbre be tree to tall as required by the operation of the replenishing mechanism. When the indicating shuttle returns to the wett replenishingjside ot the loom, slide 11 will be lowered by linger 19, and pin 46 will move away from cam 44 to enable the springs 49, 50 and 51 to again move wall 38 against the bobbins to restrain their rotation. IVall 39 is similarly controlled by slide 12.

.F rom the foregoing it will be seen that I have provided a very simple means tor restraining the rotation ot bobbins by providing each compartment ot the wett replenishing mechanism with a movable wall under control ot the replenishing mechanism and having a surface to engage the bobbins and force them against the fixed wall of the compartment. It will Jfurther be seen that I have provided a pair ot bobbin compartments with adjacent pivoted walls which have common resilient means tor holding the walls against the bobbins.

IIa-ving thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: j

1. In a` wett replenishing inechanisni Yfor looms, a guideway to hold reserve bobbins as they await movement toward transfer position, a wall tor said guideway mounted tor pivotal movement about an axis substantially parallel to the direction in which the bobbins move in said guideway and extending adjacent the' reserve bobbins, and means to move said wall pivotally to engage the bobbins in the guideway. Y v

2. In a wett replenishing mechanism for looms, a compartment to hold reserve bobbins as they await movement toward transfer position, means dening one side of the compartment and mounted tor )pivotal motion about an axis substantially parallel to the direction in which the bobbins move in said compartment and extending adjacent the reserve bobbins, and means under control ot the wett replenishing mechanism to move said First named means into engagement with the bobbins.

S. In a weft replenishing mechanism for looms, a compartment tor bobbins, means defining one side of the compartment and pivotally mounted to move about an axis substantially perpendicular to the axes of the bobbins, and means to move said irst named means against the bobbins.

4. In a weft replenishing mechanism for looms, a compartment to hold reserve bobbins as they await movement toward transi'er position, a wall tor the compartment extending upwardly from the discharge end ot the compartment and extending adjacent the reserve bobbins and pivoted to move in a plane substantially parallel to the axes ot the bobbins, and means to control the wall from the replenishing mechanism.

5. In a wett replenishing mechanism :tor looms, a bobbin compartment, and means under control ot the replenishing mechanism to vary the width o' the compartment uniformly throughout the length ot said means to cause a variation in the width of the space occupied by the bobbins. j

6. In a wett replenishing mechanism for looms, a bobbin compartment, and a wall 'for said compartment controlled by the replenishing mechanism and movable about an axis havingI a vertical component. 7. In a replenishing mechanism for looms, a pair ot bobbin compartments, a pivoted wall for each compartment, the pivoted walls being independently movable, and means common to the walls tending to move the same toward the bobbins.

8. In a wett replenishing mechanism for looms, a pair ot bobbin compartments, a pivoted wall for each compartment, and resilient means common to the walls to lili ll O

permit independent movement of the walls with respect to each other and normally moving said walls toward the bobbins.

9. In a replenishing mechanism for looms, a bobbin compartment, a vertically movable slide under control of the replenishing mechanism, a wall pivotally mounted about an axis transverse of the bobbins for said compartment normally restraining rotation of the bobbins in the compartment, and operating connections between the vertical slide and the wall to move the latter away from the bobbins as the slide is raised.

10. In a weft replenishing mechanism for looms, a bobbin compartment, a wall pivotally mounted about an axis transverse of the bobbins for the compartment and held normally against the bobbins in the compartment7 a vertically movable slide, a longitudinally and angularly movable finger, and operating connections between the slide and the wall to move the wall away from the bobbins when the linger raises the slide.

In testimony whereof I have hereunto affixed my signature.

HAROLD L. BLANCHARD. 

